Hi I have a problem in downloading the files in the repository. System.*out*.println(" id " +docId); FileUtils.*download*(docId,"C:/FilenetDownload",session); but i get the error : java.lang.NoClassDefFoundError: java.io.FileOutputStream is a restricted class. Please see the Google App Engine developer's guide for more details. at com.google.appengine.tools.development.agent.runtime.Runtime.reject(* Runtime.java:51*) at org.apache.chemistry.opencmis.client.util.FileUtils.download(* FileUtils.java:241*) at org.apache.chemistry.opencmis.client.util.FileUtils.download(* FileUtils.java:263*) at com.filenet.server.CmisFileDownload.doPost(*CmisFileDownload.java:55*) at javax.servlet.http.HttpServlet.service(*HttpServlet.java:637*) at javax.servlet.http.HttpServlet.service(*HttpServlet.java:717*) at org.mortbay.jetty.servlet.ServletHolder.handle(*ServletHolder.java:511*) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(* ServletHandler.java:1166*) at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter( *HeaderVerificationFilter.java:35*) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(* ServletHandler.java:1157*) at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(* ServeBlobFilter.java:60*) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(* ServletHandler.java:1157*) at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(* TransactionCleanupFilter.java:43*) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(* ServletHandler.java:1157*) at com.google.appengine.tools.development.StaticFileFilter.doFilter(* StaticFileFilter.java:122*) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(* ServletHandler.java:1157*) at com.google.appengine.tools.development.BackendServersFilter.doFilter(* BackendServersFilter.java:97*) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(* ServletHandler.java:1157*) at org.mortbay.jetty.servlet.ServletHandler.handle(*ServletHandler.java:388* ) at org.mortbay.jetty.security.SecurityHandler.handle(* SecurityHandler.java:216*) at org.mortbay.jetty.servlet.SessionHandler.handle(*SessionHandler.java:182* ) at org.mortbay.jetty.handler.ContextHandler.handle(*ContextHandler.java:765* ) at org.mortbay.jetty.webapp.WebAppContext.handle(*WebAppContext.java:418*) at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(* DevAppEngineWebAppContext.java:78*) at org.mortbay.jetty.handler.HandlerWrapper.handle(*HandlerWrapper.java:152* ) at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle( *JettyContainerService.java:363*) at org.mortbay.jetty.handler.HandlerWrapper.handle(*HandlerWrapper.java:152* ) at org.mortbay.jetty.Server.handle(*Server.java:326*) at org.mortbay.jetty.HttpConnection.handleRequest(*HttpConnection.java:542*) at org.mortbay.jetty.HttpConnection$RequestHandler.content(* HttpConnection.java:938*) at org.mortbay.jetty.HttpParser.parseNext(*HttpParser.java:755*) at org.mortbay.jetty.HttpParser.parseAvailable(*HttpParser.java:218*) at org.mortbay.jetty.HttpConnection.handle(*HttpConnection.java:404*) at org.mortbay.io.nio.SelectChannelEndPoint.run(* SelectChannelEndPoint.java:409*) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(* QueuedThreadPool.java:582*) Is there something wrong from my side. Plz help and explain me to do it. thanks